II GERANIACE^ 131 



one cotyledon is folded inside the other ; iu the Geranium 

 they are convolute, one half of each being folded inside 

 one half of the other — the inner halves being the smaller, 

 the outer the larger ones.^ 



The species differ considerably as regards hairs. In 

 G. sanguineum and G. pliceum they are long and 

 spreading. In G. sylvaticum, G. pratense, G. pyrenai- 

 cum, G. Eohertianum, G. molle, and G. dissectum those 

 on the upper part of the stem are glandular, while in 

 G. sylvaticum the lower part is glabrous or with re- 

 flexed hairs. In G. pratense those below are appressed ; 

 in G. pyrenaicum, soft and short ; in G. molle, long, soft, 

 and spreading ; and in G. Robertianum, few and soft. 

 G. dissectum varies a good deal, but generally has long 

 reflexed hairs ; while G. lucidum, is glabrous or nearly 

 so. The leaves of G. sanguineum assume a vertical 

 position in bright sunlight. 



The Geraniums of warm regions are generally 

 annuals or biennials. The comparatively few Alpine 

 species are, as usual, perennial. 



Erodium 



Of this genus we have three species : E. maritimum 

 has simple ovate leaves, while £. moschatum has the 

 leaves pinnate with ovate segments, and E. cicutarium 

 pinnate with pinnatifid segments. Nectaries are present 

 as in Geranium. The five stamens facing the petals are 

 without anthers. 



E. cicutarium. — This species was well described by 

 Sprengel. There are two varieties of E. cicutarium, 

 (a) genuinum and (&) pimpinellifolium. According to 

 Ludwig, in the usual form, E. cicutarium,, var. genu- 

 inum, the flower is hombgamous or slightly protogynous. 

 The anthers place themselves close to the stigmas, so 

 that self-fertilisation is almost certain. The flower opens 

 about 7 A.M. , and by mid-day the petals have fallen. It is 

 perfectly fertile with its own pollen. On the other hand, 



' Avebury (Lubbock), ,0» Seedlings, i. 298. 



